Landscape effects of forest loss in a pollination system
Landscape effects of forest loss in a pollination system
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授粉系统中森林丧失的景观影响
DOI：
10.1007/s10980-007-9153-z
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发表时间：
2007
影响因子：
5.2
通讯作者：
J. Ascher
中科院分区：
文献类型：
--
作者：
Hisatomo Taki;P. Kevan;J. Ascher
森林损失被认为是动物授粉的林地植物繁殖成功率变化的一个原因，与它们的传粉媒介的变化有关。为了分析这种影响，重要的是要包括所有三个关键因素：景观、传粉者和植物。研究了森林生态系统景观对昆虫传粉植物群落和植物种群的影响。然后，我们质疑传粉者群落的丰度和物种丰富度是否随着森林损失的增加而减少，这反过来导致昆虫传粉植物的生殖输出减少。在集约化管理的农田中，我们对12个蜜蜂传粉草本植物赤藓（Erythronium americum）种群进行了研究。我们也用捕蜂器取样蜜蜂作为潜在的传粉媒介。我们使用森林覆盖率和六个半径（250、500、750、1,000、1,250和1,500 m）内的森林边缘长度来量化研究景观。回归分析表明，所有采集到的蜜蜂的丰度和物种丰富度仅与750 m半径范围内的森林覆盖率呈正相关。我们还发现了e的种子集的正相关关系。以相同半径的森林覆盖率和所有采集到的蜜蜂的丰度作为预测变量。这些结果表明，森林损失对潜在传粉者群落和某些林地草本植物的种子集有负面影响。
Forest loss has been invoked as a cause for changes in the reproductive success of animal-pollinated woodland plants, associated with changes in their pollinators. To analyze such effects, it is important to include all of the three key players: landscapes, pollinators and a plant. We investigated effects of forest loss on an insect-pollinated plant through landscapes in forested ecosystems to pollinator communities and plant populations. Then we questioned if abundance and species richness in pollinator communities decrease as forest loss increases, and this in turn leads to a decrease in reproductive output of an insect-pollinated plant. We made a study with 12 populations of the bee pollinated herb,Erythronium americanum, in a landscape characterized by scattered fragments of deciduous forest within intensively managed agricultural fields. We also sampled bees as the potential pollinators by pan traps. We quantified the study landscapes using the amount of forest cover and the length of forest edge within each of the six radii (250, 500, 750, 1,000, 1,250 and 1,500 m). Regression analyses showed that the abundance and species richness of all collected bees were positively related to only the forest cover at the radius of 750 m. We also found the positive relationships for the seed set ofE. americanumwhen the forest cover at the same radius and abundance of all collected bees were used as the predictor variables. These results indicate that forest loss causes negative impacts on potential pollinator communities and seed sets of some woodland herbs.